[swss]: Update swss/common and add --batch_size 8192 option to orchagent (#668)

dockers/docker-orchagent/orchagent.sh

@@ -8,6 +8,9 @@ MAC_ADDRESS=`ip link show eth0 | grep ether | awk '{print $2}'`
 mkdir -p /var/log/swss
 ORCHAGENT_ARGS="-d /var/log/swss "
 
+# Set orchagent pop batch size to 8192
+ORCHAGENT_ARGS+="-b 8192 "
+
 # Add platform specific arguments if necessary
 if [ "$ASIC" == "broadcom" ]; then
     ORCHAGENT_ARGS+="-m $MAC_ADDRESS"